Telephone-service apparatus



No. 750,769. PATENTED JAN. 26, 1904.

U. S. JACKSON. TELEPHONE SERVICE APPARATUS.

APPLICATION FILED MAY 31, 1902. N0 MODEL. 4 SHEETS-SHEETI.

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U. s. JACKSON. v TELEPHONE SERVICE APPARATUS.

APPLICATION FILED MAY 31, 1902.

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No. 750,769. PATENTED JAN. 26, 1904.

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TELEPHONE SERVICE APPARATUS.

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' No. 750,769. PATENTED JAN. 26, 1904.

I U. S. JACKSON.

TELEPHONE SERVICE APPARATUS.-

APPLIGATION FILED MAY 31, 1902. H0 MODEL. 4 SHEETS-SHEET 4.

9/11 w r/2M UNITED STATES Patented January 26, 1904.

PATENT OEEIcE.

URIAH S. JACKSON, OF OSSIPEE, NEl/V HAMPSHIRE, ASSIGNOR TO THE SUPERIOR AUTOMATIC TELEPHONE COMPANY, OF BOSTON, MASSA- CHUSETTS, A CORPORATION OF MAINE.

TELEPHONE-SERVICE APPARATUS.

SPECIFICATION forming part of Letters Patent No. 750,769, dated January 26, 1904;.

Application filed May 31, 1902. Serial No. 109,796. (No model.)

To all whom it may concern.-

Be it known that I, URIAH S. JAoKsoN, of Ossipee, in the county of Carroll and State of New Hampshire, have invented a new and useful Improvement in Telephone-Service Apparatus, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to a telephone-service apparatus so constructed and arranged that any user in the group with which the service is connected may call up any other one of the group and at the same time out off all others.

The exact arrangement and construction of the apparatus and system may be best understood by reference to the full description and drawings.

The several figures constituting the drawings are as follows:

Figure 1 shows the outside of the box in elevation. Fig. 2 shows the box in elevation, the door being open. A part of the dial is represented as broken away. Fig. 3 shows the principal parts in elevation. Fig. 4 is a vertical section showing the interior parts. Fig. 5 shows a detail. Fig. 6 is a diagram illustrating the method of connection with the source of electricity.

The outside case or box of my instrument is indicated by A. A door B is hinged to the case and is shown as closed in Fig. 1 and as open in Fig. 2. There are as many of these boxes as there are users in the system. Each user has a number. In the present system there are fourteen of these boxes, each of which is indicated by a numeral on the dial D, Figs. 1 and 2. A pointer D moves on the dial and is made to indicate to the user that the desired or called box is in connection and may be communicated with.

The mechanisms by which the calls are made may be described as follows: The lever L is rigidly connected to a shaft L and the said shaft L has fixed upon it a drum L and a notched wheel L, as shown in Fig. 4. A coiled spring S, as indicated in dotted lines, has one end attached to the drum L and the other end to the post a on the plate A. A

pawl L is pivoted to the spur-gear L and is adapted to engage with the notched wheel L, thus admitting this notched wheel to be turned by the depressing-lever L in the direction of the arrow without turning the spur-gear L". This action of turning the notched wheel L, and with it the drum L, winds up the spring, and as one end of the said spring is attached to the drum L it is evident that the reaction of the said spring will give motion to the spurgear L in a direction opposite to that indicated by the arrow. This action will take place whenever the lever L is depressed. The lever is returned to its normal or elevated position by the movement of the spur-gear L acting through the pawl L notched wheel L, drum L, and shaft L The spur-gear L communicates motion to the pinion T and the shaft C, thence to the contact make-and-break wheel C (See Figs. at and 5.) The train T, T T and T and the escapement T have no function except to prevent the make-and-break wheel C from rotating too rapidly. The number of points C on the wheel C are equal to the numbers on the dial D and to the number of boxes in the system. The pin C C in themake-and-break wheel C Figs. 3 and 5, extends through said wheel and serves two purposes. Thus the part C above the wheel serves as a stop for the wheel when it comes in contact with the stop-key C, which may be inserted in any one of the holes, numbered from one to fourteen, on the stationary disk C. Thus the said make-and-break wheel may be made to stop after having made the desired number of contacts with the electrodes Cr and G, as will be explained hereinafter. The part C below said make-and-break wheel serves to stop the said wheel by coming in contact with the end L of the lever L when the said lever is in its normal or resting position, as indicated in Fig. Q that is, the wheel is stopped when it has made a complete rotation and has brought the pointer D to 0 on the dial D, as will be explained. The lever L'has upon it a pin L which is arranged to engage with the hook L on the bell-crank lever L L (pivoted at L This lever L L is thrown into its locking position, as shown in Fig. 3, by the spring L and holds the operating or winding-up lever L in the position indicated by dotted lines, so that the said winding-up lever L cannot be used except when the cam-boss L on the pinion D is in the position shown in dotted lines in Fig. 2, at which position thel pointer-hand D is at O on the fixed dia The above-described movements are dependent upon the action of the coil-spring S, which is attached to the drum L and the spur gear-wheel L and relate to the operation of the electric makeandbreak electrodes G and G. (See Fig. 3.)

I will now describe the electrical device that operates the pointer-hand D on the fixed dial D. An electromagnet M M is energized by an'electric current passing through the wire on, electrodes G G, and the wires m 772 Fig. 3. An armature M is pivoted at M and has attached to it a double-acting pawl M The action of the magnet when energized is to swing the double pawl M in one direction and that of the spring N 4 (when the magnet is not energized) to swing the said pawl in the other direction, and this back and forth motion of the double pawl M serves to give an intermittent rotary motion to the trunnionpinion D The trunnions of this pinion are indicated by D D". The pointer-hand D is attached to the shaft D of the pinion D so that a forth and back motion of the double pawl M will cause the pointer-hand D to move one division on the fixed dial Dthat is, the forth and back completed motion of the said double pawl will cause the pointer-hand to move from O to 1 and the next from 1 to 2, and so on.

The telephone-circuit is indicated by the wires 01- n, which are respectively connected to the spring-electrodes H and H WV hen the contact-points of the electrodes are together, as indicated in Fig. 3, then the desired telephone-box may be called; but when these contact-points are not together no telephone can be called. There are two devices for closing the circuit through the electrodes. The first consists of the bent lever N N, (pivoted at N.) The upper end N of this lever rests against the spring-electrode H and will hold the said spring-electrode in contact with the other electrode H for the reason that the bent lever N N has a strong spring N which will force the end N upward, and thus keep the contact-point of the electrode H against the corresponding point of the electrode H thus keeping the telephone-circuit closed and ready for use; but when the lever L is in its raised or normal resting position then the pin L presses against the lower arm N of the lever N N and thus causes the upper arm N to be depressed, thus allowing the electrode H to break contact. (See Fig. 2.) The other device for closing the electrodes H H consists of a pin H on the pinion D". (See Fig. 2.) This pin is so located that when the pointerhand D" is on the number that indicates the number'of the box in which it is placed then the telephone-circuit is closed and the telephone of this box can be used. The location of the pin H on the pinion is different for each box. For instance, in box No. l'the pin H is so placed that when No. 1 is called, it, the pin, will close the telephone-circuit when the hand is on No. 1, and in box No. 6 the pin is so placed that it will close the telephone-circuit when the hand is on No. 6 of the dial, and so on.

The operation of my telephone apparatus is as follows: Suppose that No. 1 wishes to call No. 6. He puts the stop-key G into the hole No. 6 in the disk C. Then he depresses the lever L. (The levers L of all the boxes are free when the pointer-hand is on O.) That action at once frees the lower end of the bent lever N N and allows the spring N to throw the end N upward, thus closing the circuit through the telephone-electrodes H H and thence the telephone-circuit itself. A continued depression of the lever winds up the actuating-spring and causes the notched contact-wheel C to rotate. This wheel will continue to rotate until the pin C" on it comes in contact with the stop-key Cthat is, until six of the points C of the notched wheel 0 have come in contact with the electrode G six timesthus making six breaks and contacts, and as each make and break, acting through the circuit m m m (see Figs. 3 and 6,) will charge and discharge the magnet M it follows that the double-pawl lever M will have operated in all the boxes and set all of the trunnion-pinions D ahead six numbers. This action will cause the pin H of box No. 6 to close the telephone-circuit for that box and enable No. 1 to communicate with No. 6, as desired. It will be noticed that although all of the levers L of the boxes are free when none are in use as soon as a lever in any one box is depressed it will start the pinions D of all of the boxes, which will cause the boss L to move from under the end L of the lever L L, and thus allow them to hook onto their respective pins L and at once lock all of the levers L.

An enumerator, as E, may be placed at any convenient point. A stop -pin it serves to limit the motion of both the lever L L and the lever N N To restore the apparatus to its normal condition, the user withdraws the stop-key C from the hole in the disk C. This action allows the movements of the several parts to continue until the pin C on the notched contact-wheel C comes in contact with the end L of the lever L L and the pointer-hand is on 0.

I claim 1. In a telephone-service apparatus: a pin- IIO ion-Wheel adapted to receive a step-by-step rotating motion: means for producing said motion: a pointer on said Wheel adapted to indicate on a dial a box-number, as described: a cam-boss on said pinion; a locking bell-crank lever having a hook upon one end, and arranged to be operated by said cam-boss; and a Winding-up lever having a pin, With which the said hook engages and thereby locks the said Winding-up lever, substantially as and for the purpose set forth.

2. In atelephone-service apparatus: aclocktrain; a hand-lever adapted to give motive energy to the said clock-train; an electrical circuit; a spring-actuated bent lever constructed to close said electrical circuit; and a pin on said hand-lever adapted to hold back the said spring-actuated bent lever When said hand-1ever is up, and to release said spring-actuated 20 bent lever When depressed, whereby said cirscribing Witnesses, on this 28th day of May, A. D. 1902.

URIAH S. JACKSON. Witnesses:

FRANK G. PARKER, WILLIAM H. PARRY. 

